Frequently Asked Questions

A curated summary of the top questions asked on our Slack community, often relating to implementation, functionality, and building better products generally.
Statsig FAQs

Can multiple SDKs be used on a site without creating problems, such as a JavaScript site with a React app using both JavaScript and React SDKs?

Using multiple SDKs on a site is technically possible, but it can lead to complications. The Statsig JavaScript SDK and the React SDK are designed to be used independently. If you use both on the same site, they will each maintain their own state and won't share information.

This could lead to inconsistencies in feature gate evaluations and experiment assignments.

If your site is primarily in JavaScript but includes a React app, it's recommended to initialize Statsig with the JavaScript SDK and then pass the initialized Statsig object into the React app. This way, you ensure that both parts of your application are using the same Statsig state.

However, if your React app is substantial or complex, it might be more beneficial to use the React SDK for its additional features, like the StatsigProvider and React hooks. In this case, you should ensure that the JavaScript part of your application doesn't also initialize Statsig, to avoid the aforementioned issues.

The React SDK brings in the JS SDK as well, so you don’t need to include it separately. Once that is initialized then you can use the ‘statsig’ object directly.

However, you’ll have to be careful - the react SDK internally keeps track of the state of the user, so if you try to update the user outside the provider, your react component tree won’t rerender with updates. Similarly, if you try to call methods before the react SDK initializes the js sdk instance internally, you could run into issues.

The best approach depends on the specifics of your application and its usage of Statsig.

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What builders love about us

OpenAI OpenAI
Brex Brex
Notion Notion
SoundCloud SoundCloud
Ancestry Ancestry
At OpenAI, we want to iterate as fast as possible. Statsig enables us to grow, scale, and learn efficiently. Integrating experimentation with product analytics and feature flagging has been crucial for quickly understanding and addressing our users' top priorities.
Dave Cummings
Engineering Manager, ChatGPT
Brex's mission is to help businesses move fast. Statsig is now helping our engineers move fast. It has been a game changer to automate the manual lift typical to running experiments and has helped product teams ship the right features to their users quickly.
Karandeep Anand
At Notion, we're continuously learning what our users value and want every team to run experiments to learn more. It’s also critical to maintain speed as a habit. Statsig's experimentation platform enables both this speed and learning for us.
Mengying Li
Data Science Manager
We evaluated Optimizely, LaunchDarkly, Split, and Eppo, but ultimately selected Statsig due to its comprehensive end-to-end integration. We wanted a complete solution rather than a partial one, including everything from the stats engine to data ingestion.
Don Browning
SVP, Data & Platform Engineering
We only had so many analysts. Statsig provided the necessary tools to remove the bottleneck. I know that we are able to impact our key business metrics in a positive way with Statsig. We are definitely heading in the right direction with Statsig.
Partha Sarathi
Director of Engineering
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